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P=345 W W=?
U=230 V
t=5 min=300 s
P=U*I //:U
I=P/U
I=345 W/230 V
I=1,5 A
W=U*I*t
W=230 V*1,5 A* 300 s
W=103500 J=103,5 kJ,
Odp: Mikser wykonał pracę 103500 J.